What is the output for the below code ? public class NameBean { private String str; NameBean(String str ){ this.str = str; } public String toString() { return str; } } import java.util.HashSet; public class CollClient { public static void main(String ... sss) { HashSet myMap = new HashSet(); String s1 = new String("das"); String s2 = new String("das"); NameBean s3 = new NameBean("abcdef"); NameBean s4 = new NameBean("abcdef"); myMap.add(s1); myMap.add(s2); myMap.add(s3); myMap.add(s4); System.out.println(myMap); } }

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  1. das abcdef abcdef

  2. das das abcdef abcdef

  3. das abcdef

  4. abcdef abcdef

Show answer
Correct Option: A

AI Explanation

To answer this question, let's go through the code step by step.

The code creates a HashSet called myMap and adds four objects to it. Two of the objects are of type String, and the other two are of type NameBean.

Here's what happens:

  1. Two String objects, s1 and s2, are created using the new keyword and initialized with the value "das".
  2. Two NameBean objects, s3 and s4, are created using the new keyword and initialized with the value "abcdef".
  3. All four objects are added to the myMap HashSet using the add() method.
  4. Finally, the contents of the myMap HashSet are printed using System.out.println().

Now let's analyze the options:

Option A) das abcdef abcdef - This option is correct because it matches the output of the code. The HashSet myMap contains the string "das", followed by the two NameBean objects with the value "abcdef", and the toString() method of NameBean returns the value of the str variable, which is "abcdef".

Option B) das das abcdef abcdef - This option is incorrect because it includes duplicate strings "das". However, HashSet does not allow duplicate elements, so only one instance of "das" will be added to myMap.

Option C) das abcdef - This option is incorrect because it does not include the second occurrence of "abcdef" from the NameBean objects.

Option D) abcdef abcdef - This option is incorrect because it does not include the "das" strings.

The correct answer is A.

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